Least k > 1 such that k^n - n > 1 is semiprime, or 0 if no such k exists.

Terms

a(0) =5a(1) =4a(2) =5a(3) =3a(4) =6a(5) =2a(6) =2a(7) =5a(8) =8a(9) =3a(10) =4a(11) =11a(12) =15a(13) =5a(14) =2a(15) =0a(16) =4a(17) =2a(18) =14a(19) =7a(20) =48a(21) =42a(22) =6a(23) =35a(24) =2a(25) =7a(26) =602a(27) =3a(28) =16a(29) =13